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Proceedings of IEEE Symposium on Computer-Aided Control Systems Design (CACSD)

7-9 March 1994

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Displaying Results 1 - 25 of 86
  • Role of standardization in future evolution of control design automation tools

    Publication Year: 1994
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (46 KB)

    Summary form only given. As in other design automation industries, standardization can significantly expand the utility of control system design automation tools. Standardization increases the number of users by making the tools easier to use and allowing users to mix and match the best tools from different vendors. It also allows the development of special purpose or niche tools further expanding... View full abstract»

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  • Proceedings of IEEE Symposium on Computer-Aided Control Systems Design (CACSD)

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (33 KB)
    Freely Available from IEEE
  • Software-based fault-tolerant control design for improved power plant operation

    Publication Year: 1994, Page(s):585 - 590
    Cited by:  Patents (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The use of fault-tolerance has increasingly become an important requirement for power plant control because of safety and availability considerations. Typical applications in process control employ redundant hardware for data acquisition and processing. The primary objective is to maintain the operation of the plant, even in the presence of anomalies in instrument channels. The performance of a sy... View full abstract»

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  • Fuzzy logic-based PID autotuner design using simulated annealing

    Publication Year: 1994, Page(s):67 - 72
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A method to automatically design a fuzzy logic autotuner (FLA) for PID regulators is described. The autotuner evaluates a fuzzy logic rule base obtained by application of simulated annealing (SA) optimization procedures to a set of chosen initial controllers for a system. Both autotuner and the SA procedures optimize an objective function defined by a set of system performance criteria. The autotu... View full abstract»

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  • The ANDECS-CACE framework A RSYST for integrated analysis and design of controlled systems

    Publication Year: 1994, Page(s):389 - 394
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    Computer-aided control engineering (CACE) environments, in order to be reusable in a broad spectrum of applications, have to be based on an open software framework which provides seven classes of services: database services; model-definition services; algorithmic services; tool-control services; task-control services; user-interaction services; message services. Details of the ANDECS framework A R... View full abstract»

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  • Computer aided design of advanced control algorithms for nuclear reactor control

    Publication Year: 1994, Page(s):591 - 596
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper discusses the computer-aided design of advanced control algorithms for a nuclear PWR-reactor. The implementation of the simulation model and the integration of the control methods in a typical CADCS-package are considered. The control problem may well serve as a new benchmark problem for CADCS. To evaluate the control performance of the digital control algorithms a comparison is made be... View full abstract»

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  • Multi-objective design of controllers with fuzzy logic using the control engineering computation environment ANDECS

    Publication Year: 1994, Page(s):75 - 82
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The fuzzy-control methodology can be seen as a systematic way to specify controllers with nonlinear gain surfaces. To properly tune such controllers, computer-aided techniques can be applied provided appropriate plant models are available such as in more classical design approaches. In particular, it is shown how a multi-models/multi-criteria design for controllers with fuzzy logic can be carried ... View full abstract»

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  • Stability robustness analysis and design for linear systems with structured time-invariant uncertainty

    Publication Year: 1994, Page(s):403 - 408
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    A new sufficient condition is derived from a general framework for linear state space models maintaining asymptotic stability in spite of existence uncertainty. Constant structured design problem is solved by using a numerical optimization program. In all examples we examined the results of stability robustness analysis and synthesis based on our sufficient condition are less conservative than tho... View full abstract»

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  • Applying on-line computer-aided control system design to the manufacturing industry enhances control performance

    Publication Year: 1994, Page(s):429 - 434
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Why are advanced signal filtering, system identification, optimal control and other technologies not common in the manufacturing industry? What is the vision for manufacturing in 2010 and why is on-line computer aided control system design essential? Inhibitors and supporters of the dynamics of change are identified. The author addresses these issues and shows the answer lies in the integration of... View full abstract»

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  • Using object-orientation in developing an extendible CACSD package

    Publication Year: 1994, Page(s):255 - 260
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The objective of this paper is to discuss the general development of a computer-aided control system design (CACSD) package in conjunction with various interdisciplinary objectives. In order to meet the needs of a large and diverse community of users using various control theories, a CACSD package should have a contemporary windows interface, have graphical interaction and be easily extendible to ... View full abstract»

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  • Computer-aided control system design accounting pole-zero cancellations by the method of inequalities

    Publication Year: 1994, Page(s):481 - 488
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Based on the method of inequalities, we propose a computer-aided design method for single-input single-output unity feedback systems accounting the influence of pole-zero cancellations. First, we derive a simple pole-zero placement algorithm which can avoid specified pole-zero cancellations with the order of the controller fixed. Then we propose a simple modification of the search algorithm by tak... View full abstract»

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  • Controller structure definition via intelligent process control

    Publication Year: 1994, Page(s):599 - 600
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    Industrial challenge problems like the Tennessee Eastman Plantwide Control Problem of Downs and Vogel (1990) prompted us to employ intelligent control principles for addressing the selection and pairing problem. A knowledge-based, object-oriented framework for controller structure definition is described in this paper View full abstract»

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  • Designing fuzzy net controllers using GA optimization

    Publication Year: 1994, Page(s):83 - 88
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    As plant specifications become complicated, more robust controller design methodologies are needed. A genetic algorithm optimizer, which utilizes natural evolution strategies, offers a promising technology that supports optimization of the parameters of fuzzy logic and other parameterized non-linear controllers. This paper shows how GAs can effectively and efficiently optimize the performance of p... View full abstract»

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  • Automatic design of digital controllers

    Publication Year: 1994, Page(s):409 - 414
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    In this paper a procedure for the automatic design of digital SISO controllers is presented. The design is based solely on input-output data from the process, and the user does not necessarily have to make any design decisions. The first step of the design procedure is the identification of a process model and the estimation of its uncertainty. In the second step a controller is designed based on ... View full abstract»

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  • The CACSD package SIMART: description and case study

    Publication Year: 1994, Page(s):461 - 466
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    This note describes an advanced control package called SIMART that supports all the stages of the controller design. A general description of the available control design methodologies as well as an application example, the position control of a flexible arm, are given View full abstract»

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  • Computer-aided decoupling controller design

    Publication Year: 1994, Page(s):435 - 444
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    An optimization-based decoupling controller design approach is proposed for linear time-invariant multivariable systems. The formulation of the optimization program is based on the description of all decoupling controllers and all achievable decoupled I/O maps. By considering only decoupling controllers, the design of MIMO feedback systems is simplified: the controller design for an n-input n-outp... View full abstract»

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  • ControlH: a fourth generation language for real-time GN&C applications

    Publication Year: 1994, Page(s):261 - 270
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    Describes the defining characteristics of the language ControlH. ControlH is being designed under the ARPA DSSA (Domain Specific Software Architectures) Program. ControlH is designed for describing guidance, navigation and control (GN&C) algorithms in a concise yet rigorous manner. The language objects, structure, data types, and operations have been tailored to the domain of GN&C algorith... View full abstract»

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  • OmSim-an integrated interactive environment for object-oriented modeling and simulation

    Publication Year: 1994, Page(s):285 - 290
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The new integrated and interactive environment OmSim, for modeling and simulation of dynamical systems, is introduced. OmSim uses the object-oriented modeling language Omola. The use of OmSim is illustrated by a practical example. The architecture of OmSim is presented and related to a reference model for open architectures for computer aided control engineering View full abstract»

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  • Adjustable solutions of doubly coprime matrix fraction descriptions

    Publication Year: 1994, Page(s):489 - 495
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Using the concept of infinite eigenstructure assignment in generalized systems, explicit formulas for calculating the polynomial generalized Bezout identity is proposed. The degree of the polynomial matrix is directly related to the length of the longest infinite eigenvector chain of the associated generalized state-space representation. Hence the method of infinite eigenstructure assignment can b... View full abstract»

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  • An ACSL-model translator to the neutral Fortran DSblock-model format

    Publication Year: 1994, Page(s):143 - 148
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    One problem in multidisciplinary simulation is to merge models which originate in different disciplinary environments into a common computer-executable model for computational experimenting. The paper reports on a possible solution thereof. This is based on a public-domain, application-neutral, formally defined Fortran or C format for dynamic input/output systems, called DSblock, to which “h... View full abstract»

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  • CAMeL-an open CACSD environment

    Publication Year: 1994, Page(s):553 - 560
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    This paper introduces the design environment CAMeL (Computer-Aided Mechatronic Laboratory) which supports the whole design cycle of mechatronic systems. Modern CACSD tools have to be open and easily combinable with other existing tools designated to perform special design tasks. CAMeL is a process-based development framework for control systems. Beside an internal toolset for linear analysis, nonl... View full abstract»

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  • Analytical controller design strategy for remotely operated systems with long time delays

    Publication Year: 1994, Page(s):601 - 602
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    This paper presents a new analytical controller design strategy for remotely operated systems, emphasizing on the stability of closed-loop control systems involving long time delays. A model-predictive control loop is constructed and implemented inside a digital controller to provide predictive state information, and an efficient model reduction method is applied to yield a reduced-order digital c... View full abstract»

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  • A modeling language for hybrid systems

    Publication Year: 1994, Page(s):339 - 344
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The general hybrid systems modeling language (HSML) described here will serve two purposes: to define formally what is meant by the term “hybrid system”, and to provide the basis for language-based “front ends” for hybrid system simulation environments. Features of HSML include: hierarchical, modular construction of models; consistent yet distinctive definition of continuou... View full abstract»

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  • A nonlinear PID-type controller utilizing fuzzy logic

    Publication Year: 1994, Page(s):89 - 94
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    This paper presents a new controller model, the fuzzy-PID controller, which merges PID control and fuzzy control in order to improve system performance especially when nonlinearity, uncertainty and complexity are involved. The proposed model provides a mechanism to achieve PID control selftuning and encodes different control strategies for use under different circumstances in a fuzzy rulebase. The... View full abstract»

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  • A methodology for formal specification of logic controllers from informal specifications

    Publication Year: 1994, Page(s):213 - 218
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    We propose a methodology for development of logic controllers based on a metalogical framework first proposed by Hamfelt. The methodology supports a structured piecemeal specification of logic controllers. This is accomplished by using schematic descriptions of logic controller modules arranged in a multilayered hierarchy. Each level is more comprehensive than the one immediately below thus repres... View full abstract»

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